An 18-year-old woman was killed Wednesday night when she crashed her moped on Lunalilo Home Road in Hawaii Kai. The crash happened at about 11 p.m. Police say the woman hopped a curb and crashed into a metal pole. She was not wearing a helmet and was pronounced dead at the scene. The cause of the crash is under investigation. Police say speed may have been a factor in the crash and they're investigating if alcohol also may have played a role.